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  Plantae
      Pteridophyta
            Polypodiopsida
                    Psilotales
                            Psilotaceae
                                     Psilotum
                                           [Bernhardia]
                                           [Hoffmannia]
                                             Psilotum nudum
                                                   [Bernhardia antillarum]
                                                   [Bernhardia deppeana]
                                                   [Lycopodium nudum]
                                                   [Psilotum domingense]
                                                   [Psilotum floridanum]
                                                   [Psilotum triquetrum var. gracile]
                                                   [Psilotum triquetrum]